That's a tough question. I suppose that if the price of silver were to skyrocket it would almost certainly mean the purchasing power of the dollar has crashed further than it already is.
At that point you'd almost have to sell a little bit of silver because your fiat dollars would buy less and less of your everyday necessities.

I believe that if silver hits $30+ I'd probably begin selling a little here and there and buy hard assets with it like land. But I'd never sell it all unless I had no other choice. I love my shiny.